Radiation hardening self-cleaning nano-optical protection film

Abstract

The invention discloses a radiation resistant selfpurging nanometer protective film, it relates to a protective film which can be used on surfaces of optical parts of an apparatus. The current films can be dyed, after accepting air radicalization for a long period, spectrum transmittance decreases greatly. And the films are easily polluted rapidly. The elements weight fraction of the invention are: tetrabulyl titanate 1-4 shares, absolute ethyl alcohol 3-9 shares, dimethyl formamide 0.001-1 shares, hydrochloric acid 0.01-1 shares, glacial acetic acid 0.1-1 shares, water 0.02-1 shares, Ce(NO3)3 0.001-0.04 shares, LaCl3 0.003-0.05 shares. The protective film of the invention, the size of nanometer structure can reach 20-30nm; the spectrum transmissibility of visible area can reach more than 88%, the degradation ratio of normal organic contamination of spacecraft can reach 40-60%; under charged particle irradiation of 2X10 to power 16 particles / cm2 dosage, the spectrum transmissibility can be reduced less than 10%.

Description

Technical field: [0001] The present invention relates to a protective film used on optical devices. Background technique: [0002] Optical systems are important payloads of spacecraft. Under the action of space environmental factors, the surface performance of optical devices will degrade, which will lead to a significant decline in the performance of the entire system. Therefore, active protection of optical surfaces is one of the important ways to improve the reliability and life of spacecraft. At present, SiO2 is mostly used at home and abroad 2 , MgF 2 , LiF and other crystal thin films are used as protective films for space optical surfaces. The advantages of these thin films are that they have good spectral transmission performance and play a good role in protecting optical surfaces. However, after long-term exposure to the space radiation environment, these films will be colored, and the spectral transmittance will decrease significantly. Also, these films will b...

AI Technical Summary

Problems solved by technology

However, after long-term exposure to the space radiation environment, these films will be colored, and the spectral transmittance will decrease significantly.

Also, these films will be quickly fouled in the presence of organic constituents in the surrounding environment

Therefore, the existing optical protective film is difficult to meet the needs of satellite long-life development; even the common optical devices used now, such as camera lenses, often affect their service life and working effect due to poor anti-radiation and dust-proof effects